<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>并集选择器</title>
		<style>
			p,div,.red {
				color: red;
				text-decoration: none;
			}
		</style>
	</head>
	<body>
		<p>p标签</p>
		<p>p标签</p>
		<p>p标签</p>
		<span>span标签</span>
		<span>span标签</span>
		<span>span标签</span>
		<div>div标签</div>
		<div>div标签</div>
		<div>div标签</div>
		<h3 class="red">h3标签</h3>
		<h3>h3标签</h3>
		<h3>h3标签</h3>
	</body>
</html>
